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    <script>
        // 删除指定数组元素
        // 要求：将数组[2,0,6,1,77,0,52,0,25,7]中的0去掉后，形成一个不包含0的新数组。
        //方法一：
        var arr1 = [2, 0, 6, 1, 77, 0, 52, 0, 25, 7];
        var arr2 = [];
        for (var i = 0; i < arr1.length; i++) {
            if (arr1[i] == 0) {
                continue;
            }
            arr2[arr2.length] = arr1[i];
        }
        console.log(arr2);

        // 方法二：
        var arr1 = [2, 0, 6, 1, 77, 0, 52, 0, 25, 7];
        var arr2 = [];
        for (var i = 0; i < arr1.length; i++) {
            if (arr1[i] != 0) {
                arr2[arr2.length] = arr1[i];
            }
        }
        console.log(arr2);
    </script>
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